Precision dose-splitting, volume math, peptide reconstitution, storage/sanitation protocol, and an interactive injection-site reference — for coaches and athletes.
Educational & harm-reduction reference — not medical advice. These calculators do not recommend compounds or doses; you supply your own numbers and they do the arithmetic. Reconstitution content is provided for research/educational purposes. Always verify every calculation independently before acting on it, and work with a qualified medical provider. Decimal/unit errors are the single most common cause of dosing accidents — double-check the syringe readout against the math.
Calculator 01
Weekly dose splitter
Split a total weekly amount across multiple injections to keep blood levels stable. More frequent, smaller shots smooth out peaks and troughs.
Inputs
EOD averages ~3.5 injections/week. "Per day" multiplies by 7 for the weekly split.
Per injection
250mg
across 2 injections / week
Weekly total
500 mg
Monthly (≈4.33wk)
2167 mg
Calculator 02
Dose → volume
Convert a target dose into the volume to draw, based on your vial's concentration. Read it on both scales of a standard U-100 insulin syringe (1 mL = 100 units). Zero is at the needle end, as on a real pin.
Inputs
Common oil concentrations shown as presets — units reference only, not a recommendation. Use whatever your vial states.
Draw volume
1.00mL
100 units on a U-100 pin
mL scale · 0–1 mL100%
Unit scale · 0–100 U
Calculator 03
Reconstitution calculator
For lyophilized (freeze-dried) peptides & research compounds. Enter the powder amount and the bacteriostatic water you'll add — get concentration and exact draw per dose on both syringe scales. Research/educational use.
Vial & diluent
Target dose
Draw per dose
10units
0.10 mL on a U-100 pin
Concentration
2500 mcg/mL
Doses per vial
20
mL scale · 0–1 mL10%
Unit scale · 0–100 U
Protocol 04
Storage, safety & sanitation
Sterile technique and correct storage prevent the most common real-world problems: contamination, abscesses, and degraded product.
Aseptic technique — every shot
Wash hands thoroughly, then don't touch the needle or stopper.
Swab the vial stopper with a fresh alcohol pad; let it air-dry.
Swab the injection site and let it dry before piercing skin.
One needle, one use. Never re-cap or re-use; tips dull and contaminate instantly.
Draw with one needle, inject with a fresh one if drawing through a stopper dulls the tip.
Never touch the needle to fingers, clothing, or any surface before injecting.
Bacteriostatic water (with benzyl alcohol) for multi-dose reconstitution — it inhibits microbial growth. Sterile/SWFI is single-use only.
Track open dates. Label reconstituted vials with date opened.
Inspect before use: discard anything cloudy, discolored, or with particulates.
Don't share vials, pins, or water — ever. Bloodborne pathogen risk.
Hard stops — discard / seek care
Cloudy, particulate, or off-color solution → discard.
Spreading redness, heat, hard lump, or pus at a site → possible abscess/infection, seek medical care.
Fever, severe pain, or red streaking → urgent medical attention.
Aspirated blood / hit a vessel (IM) → withdraw, new pin, new site.
Any uncertainty about a calculation → stop and re-verify before injecting.
Sharps disposal
FDA-approved sharps container, or a rigid, puncture-proof sealable container.
Never bin loose needles or flush them.
Don't overfill — replace at ~¾ full.
Dispose via pharmacy take-back, mail-back, or local hazardous-waste program.
Storage temperatures & shelf life
2–8°C
Refrigerate
Reconstituted peptides; most opened vials. Keep in the fridge body, not the door.
−20°C
Freeze
Lyophilized powder for long-term storage. Avoid repeated freeze-thaw of reconstituted solution.
15–25°C
Room temp
Many oil-based solutions store at room temp away from light/heat. Follow product guidance.
Protect from light — store vials in their box or a dark container.
Reconstituted peptides are generally most stable refrigerated and used within a few weeks; stability varies by compound — when unsure, prep smaller amounts more often.
Never freeze reconstituted solution unless the specific compound is validated for it; ice crystals degrade peptides.
Let refrigerated oil-based solutions reach room temp before injecting — warmer oil draws and flows more easily.
Reference 05
Injection site guide
Tap a highlighted zone on either figure for technique, volume guidance, danger notes, and a zoomed-in close-up of exactly where the site sits. Rotate sites every injection to protect tissue.
Intramuscular Subcutaneous
Anterior (front)
Posterior (back)
Select an injection site above to see technique, safety details, and a close-up of its location.
Universal site rules
Rotate sites every injection; don't hit the same spot repeatedly — scar tissue and lumps reduce absorption.
IM: insert at 90°, deep into the muscle belly. SubQ: pinch fat, insert at 45–90° into the fat layer.
Aspirate or not per current guidance — many clinical bodies no longer require it at recommended IM sites, but it's still used at higher-risk sites; withdraw and restart if blood appears.
Avoid bruises, moles, scar tissue, broken/irritated skin, and visible veins.
Match volume to muscle — large volumes belong in glute/quad, not the deltoid or triceps.
Needle selection: IM is typically 1–1.5″, 27–30g — go longer if significant adipose tissue would leave the dose subcutaneous. For SubQ, smaller the better: a short, fine insulin pin into the fat layer.